Most ASAPScience videos just show the narrator drawing on a whiteboard, with the occasional small props (e.g. small bits of food in the recent "This is 200 calories" episode). I think that for this, they just superimposed Bill Nye onto the whiteboard using a green screen.

They're part of the spam-web, along with cracked and a few other sites, where their business model is based on creating no-content content like top-ten lists and then spewing them all over every content aggregation site on the internet.